G-cup beauty Mary Tachibana lures a man into her seductive trap. At a spa run by his wife's friend, he meets a mysterious woman whose breasts press against him during treatment. His confusion soon turns to lust, and every visit brings another obscene session that leaves him desperate for more. When he visits the spa with his wife, he finally crosses the line with Mary. But the moment his feelings become serious, she disappears along with the entire shop.